A special edge border double -ball pocket bracket system for split disease intervention treatment

Abstract

The invention belongs to the field of medical equipment and discloses a Te-type side branch double-balloon stent system for bifurcation lesion interventional therapy. The system comprises a side branch main balloon body; the tail end in the side branch main balloon body expands and then fits a Te-type balloon with a bell mouth-shaped tail end at the blood vessel opening; and the five-head end of a side branch balloon catheter penetrates in the main balloon body and the Te-type balloon. By adopting the Te-type side branch double-balloon stent system, the stent can be accurately positioned to fit the wall well; and the system is convenient to operate and realizes a relatively good effect in clinical application.

Description

technical field [0001] The invention belongs to the field of medical devices, and relates to a special-type side branch double-balloon stent system for the interventional treatment of bifurcation lesions. Background technique [0002] Bifurcation lesions are relatively common in clinical practice. Some "pseudo" bifurcation lesions (severe stenosis of the main branch and no obvious stenosis of the branch) have also become "true" bifurcation lesions (main and branch vessels) due to the displacement of the plaque during interventional therapy. branch vessels were significantly narrowed). Interventional therapy for bifurcation lesions has improved the short-term results, but the long-term results are still unsatisfactory. Drug-eluting stents can significantly reduce vascular restenosis after interventional therapy. However, for bifurcation lesions, the restenosis rate of the main branch was significantly reduced, but the problems of restenosis and thrombosis of the side branc...

AI Technical Summary

Problems solved by technology

In addition to the relatively complicated operation, for example, the guide wire is not easy to pass through the mesh of the main branch stent and enter the side branch vessels, and the balloon may rupture when it passes through or expands the mesh, etc. Others include: 1. Possible damage when the guide wire is withdrawn The opening of the side branch or the displacement of the stent; Second, the entry of the side branch guide wire through the mesh of the main branch stent or the passage of the main branch guide wire through the mesh of the side branch stent cannot ensure that the guide wire is well positioned on the central axis of the vascular lumen. During the balloon expansion process, the force on the vessel wall will be affected by uncertainty; 3. There is an unnecessary layer or two layers of metal mesh at the opening of the side branch, and some main stents may have three layers of metal mesh at both ends, increasing Fourth, if there are many side branch stents protruding from the main branch, the balloon is longer in the main branch. When the main branch balloon expands, the side branch stent migrates into the side branch, which increases the damage to the tube wall and is easy tearing of the inner membrane

5. There are too many parallel parts of the two balloons during kissing expansion, which may cause the gap at the acute angle of the opening to become longer and the obtuse angle to be over-expanded; 6. Traditional balloon expansion and stent release do not achieve the opening of the side branch The good fit of the arc-shaped transition zone in physical form is also one of the reasons for the easy formation of side branch restenosis and thrombosis after operation; shape uncertainty etc.

The main reasons for these problems may be that the operator is limited to the current instrumentation, the lack of a stent and balloon tailored to the physical shape of the bifurcation vessel opening, and the lack of a suitable balloon stent delivery system

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